Impediment adjectives are listed in this post. Each word below can often be found in front of the noun impediment in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing IMPEDIMENT.
additional, biggest, canonical, chief, considerable, constitutional, external, fatal
formidable, further, great, greater, greatest, important, insuperable, insurmountable
just, key, last, lawful, least, legal, little, main
major, mechanical, natural, only, other, physical, possible, potential
primary, principal, real, second, serious, significant, slight, slightest
small, substantial, such
Hope this word list had the adjective used with impediment you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.